I just trim the pits to about 1/4" with a #2 gaurd clippers (and below there too). It's a trick we sorta figured out in the military to not smell so bad on the long marches in the southern heat during basic training. I still do it because I'm active and it's easy to trim em when I buzz my head every couple weeks.
Unless you're a comp BBer, shaving em clean isn't very ummm... masculine... you'd look too much like you're a little kid or a queer.